Damper.



C. M. BROWN.

UAWIPER.

APPucAnoN man uw 26. ma.

Patented Apr. 20, 1915.

lNlTE SAE@ ATRN FFl@E.

CAROLINE IVI. BROVN, OE MINNEAPOLIS, MINNESOTA, ASSIGNGR TO AUTOMATICHEAT REGULATOR C0., F ST. PAUL, MINNESOTA, A CORPORATION.

DAMPER.

Specification of Letters Patent.

Patented Apr. 2&1, 1915..

Application led July 26, 1913. Serial No. 781,428.

. To all whom it may concern:

Be it known that l, CAROLINE M. BROWN, a citizen of the United States,resident of Minneapolis, county of Hennepin, State of Minnesota, haveinvented certain new and useful improvements in Dampers, of which thefollowing is a specification.

My invention relates to dampers for smoke tlues and the object of theinvention is to provide improved means for locking the damper to allowit to be set at any desired angle in the pipe.

A further object is to provide a mounting means for the damper which canbe easily and quickly applied to the wall of the pipe.

The invention consists generally in various constructions andcombinations, all as hereinafter described and particularly pointed outin the claims.

1n the accompanying drawings forming part of this speciication, Figure 1is a vertical sectional view of a pipe with my invention appliedthereto, Fig. .2 is a transverse sectional view, Fig. 3 is a view,partially in section, illustrating the locking device, Fig. 4- is adetail sectional view of a modilied construction, Fig. 5 is a detailsectional view, of Fig. 4.

n the drawing. 2 represents a pipe of ordinary construction, having anopening 3 in its wall to receive a spindle 4: 'formed on one end of anarm 5. A damper blade 6 is secured to this spindle by a suitable means,such as bolts 7, said damper being preferably curved to conformsubstantially to the wall of the pipe and braced bv means of a rod 7extending across the damper blade and having looped ends iitting withinholes in said blade. This construction allows the blade to be made ofthin material and when the rod 7 is put in place the blade may be bentto the desired degree of curvature and held in position by the rod. Anear 8 is secured to the wall of the pipe by suitable means, such asrivets 9, and said ear has lugs 10 thereon to support a pivoted bolt 11which passes through the arm 5. A weight 12 is adjustable back and forthon said arm and acts as a counter-balance for the blade 6. By means ofthis weight the blade may be balanced to hang at the desired angle inthe pipe and when so adjusted the arm may be locked by a device which Iwill now describe in detail. The lower portion of the ear has a part 12pressed outwardly theren from, forming a housing in the upper portion ofwhich is a vertical slot 13. One side wall of the housing has an opening14 therein. A bar 15 is arranged to slide in said housing and has atongue 16 formed on its `upper end fitting within a slot 13 andsupported by the lower edge thereof. This bar is capable of verticalmovement to raise said tongue into contact with the arm 5 or lower saidtongue out of the path of said arm. The bar is provided with a series ofteeth 1'? adapted to enter the hole 14 when said bar isV swung towardthat side of the housing. Vhen the bar is moved in the oppositedirection its tooth will be disengaged from the housing and longitudinalmovement of the bar in either direction will then be permitted either tolock or release the tilting arm. When the bar is moved upwardly tocontact with the arm the damper blade will be locked against furthermovement in one direction.

In Figs. 4 and 5 I have shown a modified construction, which consists inproviding a lug 18 on the arm 5 and a sliding plate 19 having a slot 2Otherein through which said arm is inserted into the pipe. This plate ispreferably provided at its lower end with a linger grip 21 and the upperedge of the opening in the pipe is in position to engage the lug 19 whenthe arm is swung to the point indicated in Fig. 4 and hold the damperblade in a vertical position against the wall of the pipe. The plate 19has a limited sliding movement between the wall of the pipe and the ear22 in which an opening is provided to register with the opening in theplate and allow the insertion of the damper blade spindle.

The device may be made in various sizes, according to the diameter ofthe pipe where it is to be used, and in various wavs the details ofconstruction maybe modified and still be within the scope of myinvention.

l claim as my invention z 4 1. The combination, with a flue, of an armpivoted thereon and provided with a spindle projecting into said iiue, acounter-balance weight for said arm, a guide, va bar movable in saidguide into the path of said arm and having means for engagement withsaid guide to hold said bar in different positions with respect to saidarm and thereby vary iio 2. The combination, With a flue, of an earsecured thereon and having an outwardly projecting portion forming ahousing, said ear and the Wall of said pipe having an opening therein, aWeighted arm having a spindle projecting into said flue through saidopening, a damper blade for said spindle, and a bar slidable in saidhousing and having means mounted for movement into the path of said arm.

3. The combination, with a flue, of an ear secured thereon, said ear andsaid flue having openings therein, an arm having a spindle fittingWithin said openings and projecting into said iue, a damper blademounted on said spindle, said ear having a housing formed thereonprovided With an opening in its side Wall, a toothed bar slidable insaid housing and having teeth adapted to enter said opening, said barbeing mounted for movement into the path of said arm.

4e. The combination, With a flue, of an arm pivoted thereon and providedWith a spindle projecting into said lue, a damper blade mounted on saidspindle, a counter-balance Weight for said arm, a sliding toothed bar, aguide therefor adapted to engage the teeth of said bar, said bar beingmounted for movement into the path of said arm.

5. The combination, With a Hue, of an arm pivoted thereon and having apart projecting Within said fiue and a Weighted end extending outwardlyrom said flue, a damper blade having its middle portion secured to theinner end of said arm and composed of comparatively thin, flexiblematerial, and a rod bridging the middle portion of said blade and havinghooked ends to enter holes in the end portions of said plate for holdingsaid end portions in their curved relation with respect to the middleportion oil' said blade, said end portions being curved to conform tothe curvature of the Wall of the flue.

In Witness whereof I have hereunto set my hand this 14th day of July,1913.

CAROLINE M. BROWN.

Witnesses:

M. N. TUTTLE, O. F. LINDs'rRoM.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

